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[MR staging in renal neoplasms. Comparison with surgical data]
E Squillaci1, A Vidiri, A Orlacchio
1Istituto di Radiologia, Università degli Studi di Roma, Tor Vergata.
La Radiologia Medica
|June 1, 1993
Summary
Magnetic resonance (MR) imaging shows high accuracy in staging renal lesions, correctly identifying neoplastic thrombi in renal veins and vena cava. While generally reliable, MR imaging occasionally overstages or understages lesions, particularly concerning lymph node and bowel involvement.
Area of Science:
- Radiology
- Oncology
- Nephrology
Background:
- Renal lesions require accurate staging for effective treatment planning.
- Magnetic resonance (MR) imaging is a key modality for evaluating renal masses.
Purpose of the Study:
- To evaluate the accuracy of magnetic resonance (MR) imaging in staging renal lesions using Robson's criteria.
- To compare MR imaging findings with pathologic results in patients with renal lesions.
Main Methods:
- Forty-six patients with renal lesions underwent magnetic resonance (MR) imaging using a 1.5 T superconductive magnet.
- MR imaging staging was compared with final pathologic staging (Robson's criteria).
Main Results:
- A positive correlation between MR imaging and pathologic results was observed in 40 out of 46 cases.
- MR imaging overstaged 4 lesions (perirenal fat, lymph node, bowel infiltration) and understaged 2 lesions (bowel infiltration, lymph node metastasis).
- MR imaging accurately detected neoplastic thrombi in the renal vein and vena cava in all evaluated cases.
Conclusions:
- Magnetic resonance (MR) imaging is a valuable tool for staging renal lesions, demonstrating high concordance with pathologic findings.
- While MR imaging is highly accurate, careful consideration of potential overstaging and understaging is necessary for specific localizations like lymph nodes and bowel.
- MR imaging reliably identifies vascular invasion, including neoplastic thrombi in the renal vein and vena cava.